diff --git a/share/mk/bsd.cpu.mk b/share/mk/bsd.cpu.mk
index 99c28aa..0670bff 100644
--- a/share/mk/bsd.cpu.mk
+++ b/share/mk/bsd.cpu.mk
@@ -91,31 +91,6 @@ _CPUCFLAGS = -march=prescott
 .  else
 _CPUCFLAGS = -march=${CPUTYPE}
 .  endif # GCC on 'i386'
-.  if ${CPUTYPE} == "crusoe"
-_ICC_CPUCFLAGS = -tpp6 -xiM
-.  elif ${CPUTYPE} == "athlon-mp" || ${CPUTYPE} == "athlon-xp" || \
-    ${CPUTYPE} == "athlon-4"
-_ICC_CPUCFLAGS = -tpp6 -xiMK
-.  elif ${CPUTYPE} == "athlon-tbird" || ${CPUTYPE} == "athlon"
-_ICC_CPUCFLAGS = -tpp6 -xiM
-.  elif ${CPUTYPE} == "k6-3" || ${CPUTYPE} == "k6-2" || ${CPUTYPE} == "k6"
-_ICC_CPUCFLAGS = -tpp6 -xi
-.  elif ${CPUTYPE} == "k5"
-_ICC_CPUCFLAGS = -tpp5
-.  elif ${CPUTYPE} == "pentium4" || ${CPUTYPE} == "pentium4m"
-_ICC_CPUCFLAGS = -tpp7 -xiMKW
-.  elif ${CPUTYPE} == "pentium3" || ${CPUTYPE} == "pentium3m" || \
-     ${CPUTYPE} == "pentium-m"
-_ICC_CPUCFLAGS = -tpp6 -xiMK
-.  elif ${CPUTYPE} == "pentium2" || ${CPUTYPE} == "pentiumpro"
-_ICC_CPUCFLAGS = -tpp6 -xiM
-.  elif ${CPUTYPE} == "pentium-mmx"
-_ICC_CPUCFLAGS = -tpp5 -xM
-.  elif ${CPUTYPE} == "pentium"
-_ICC_CPUCFLAGS = -tpp5
-.  else
-_ICC_CPUCFLAGS =
-.  endif # ICC on 'i386'
 . elif ${MACHINE_CPUARCH} == "amd64"
 _CPUCFLAGS = -march=${CPUTYPE}
 . elif ${MACHINE_CPUARCH} == "arm"
@@ -242,9 +217,5 @@ CFLAGS += -G0
 # NB: COPTFLAGS is handled in /usr/src/sys/conf/kern.pre.mk
 
 .if !defined(NO_CPU_CFLAGS)
-. if ${CC} == "icc"
-CFLAGS += ${_ICC_CPUCFLAGS}
-. else
 CFLAGS += ${_CPUCFLAGS}
-. endif
 .endif
diff --git a/share/mk/bsd.dep.mk b/share/mk/bsd.dep.mk
index 459a9c3..c452528 100644
--- a/share/mk/bsd.dep.mk
+++ b/share/mk/bsd.dep.mk
@@ -125,13 +125,8 @@ depend: beforedepend ${DEPENDFILE} afterdepend
 
 # Different types of sources are compiled with slightly different flags.
 # Split up the sources, and filter out headers and non-applicable flags.
-.if ${CC:T:Micc} == "icc"
-MKDEP_CFLAGS=	${CFLAGS:M-X*} ${CFLAGS:M-[BIDU]*}
-MKDEP_CXXFLAGS=	${CXXFLAGS:M-X*} ${CXXFLAGS:M-[BIDU]*}
-.else
 MKDEP_CFLAGS=	${CFLAGS:M-nostdinc*} ${CFLAGS:M-[BIDU]*}
 MKDEP_CXXFLAGS=	${CXXFLAGS:M-nostdinc*} ${CXXFLAGS:M-[BIDU]*}
-.endif
 
 DPSRCS+= ${SRCS}
 ${DEPENDFILE}: ${DPSRCS}
diff --git a/share/mk/bsd.lib.mk b/share/mk/bsd.lib.mk
index 9d655b6..943010c 100644
--- a/share/mk/bsd.lib.mk
+++ b/share/mk/bsd.lib.mk
@@ -65,11 +65,7 @@ PICFLAG=-fpic
 .endif
 .endif
 
-.if ${CC:T:Micc} == "icc"
-PO_FLAG=-p
-.else
 PO_FLAG=-pg
-.endif
 
 .c.po:
 	${CC} ${PO_FLAG} ${PO_CFLAGS} -c ${.IMPSRC} -o ${.TARGET}
diff --git a/share/mk/bsd.sys.mk b/share/mk/bsd.sys.mk
index fc5ec40..796d169 100644
--- a/share/mk/bsd.sys.mk
+++ b/share/mk/bsd.sys.mk
@@ -11,20 +11,18 @@
 # the default is gnu99 for now
 CSTD		?= gnu99
 
-.if ${CC:T:Micc} != "icc"
-. if ${CSTD} == "k&r"
+.if ${CSTD} == "k&r"
 CFLAGS		+= -traditional
-. elif ${CSTD} == "c89" || ${CSTD} == "c90"
+.elif ${CSTD} == "c89" || ${CSTD} == "c90"
 CFLAGS		+= -std=iso9899:1990
-. elif ${CSTD} == "c94" || ${CSTD} == "c95"
+.elif ${CSTD} == "c94" || ${CSTD} == "c95"
 CFLAGS		+= -std=iso9899:199409
-. elif ${CSTD} == "c99"
+.elif ${CSTD} == "c99"
 CFLAGS		+= -std=iso9899:1999
-. else
+.else
 CFLAGS		+= -std=${CSTD}
-. endif
 .endif
-.if !defined(NO_WARNS) && ${CC:T:Micc} != "icc"
+.if !defined(NO_WARNS)
 # -pedantic is problematic because it also imposes namespace restrictions
 #CFLAGS		+= -pedantic
 . if defined(WARNS)
@@ -82,9 +80,8 @@ CWARNFLAGS	+=	-Wno-format
 CWARNFLAGS	+=	-Wno-unknown-pragmas
 .endif
 
-.if ${MK_SSP} != "no" && ${CC:T:Micc} != "icc" && \
-	${MACHINE_CPUARCH} != "ia64" && \
-	${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
+.if ${MK_SSP} != "no" && ${MACHINE_CPUARCH} != "ia64" && \
+    ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
 # Don't use -Wstack-protector as it breaks world with -Werror.
 SSP_CFLAGS	?=	-fstack-protector
 CFLAGS		+=	${SSP_CFLAGS}
diff --git a/sys/conf/kern.mk b/sys/conf/kern.mk
index 01b1438..1e58378 100644
--- a/sys/conf/kern.mk
+++ b/sys/conf/kern.mk
@@ -6,14 +6,9 @@
 # Note that the newly added -Wcast-qual is responsible for generating 
 # most of the remaining warnings.  Warnings introduced with -Wall will
 # also pop up, but are easier to fix.
-.if ${CC:T:Micc} == "icc"
-#CWARNFLAGS=	-w2	# use this if you are terribly bored
-CWARNFLAGS=
-.else
 CWARNFLAGS?=	-Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes \
 		-Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual \
 		-Wundef -Wno-pointer-sign -fformat-extensions
-.endif
 #
 # The following flags are next up for working on:
 #	-W
@@ -29,7 +24,7 @@ CWARNFLAGS?=	-Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes \
 # operations inside the kernel itself.  These operations are exclusively
 # reserved for user applications.
 #
-.if ${MACHINE_CPUARCH} == "i386" && ${CC:T:Micc} != "icc"
+.if ${MACHINE_CPUARCH} == "i386"
 .if ${CC:T:Mclang} != "clang"
 CFLAGS+=	-mno-align-long-strings -mpreferred-stack-boundary=2
 .endif
@@ -100,22 +95,13 @@ INLINE_LIMIT?=	8000
 # GCC 3.0 and above like to do certain optimizations based on the
 # assumption that the program is linked against libc.  Stop this.
 #
-.if ${CC:T:Micc} == "icc"
-CFLAGS+=	-nolib_inline
-.else
 CFLAGS+=	-ffreestanding
-.endif
-
-.if ${CC:T:Micc} == "icc"
-CFLAGS+=	-restrict
-.endif
 
 #
 # GCC SSP support.
 #
-.if ${MK_SSP} != "no" && ${CC:T:Micc} != "icc" && \
-    ${MACHINE_CPUARCH} != "ia64" && ${MACHINE_CPUARCH} != "arm" && \
-    ${MACHINE_CPUARCH} != "mips"
+.if ${MK_SSP} != "no" && ${MACHINE_CPUARCH} != "ia64" && \
+    ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
 CFLAGS+=	-fstack-protector
 .endif
 
diff --git a/sys/conf/kern.pre.mk b/sys/conf/kern.pre.mk
index 4deaea8..db244c4 100644
--- a/sys/conf/kern.pre.mk
+++ b/sys/conf/kern.pre.mk
@@ -23,38 +23,25 @@ NM?=		nm
 OBJCOPY?=	objcopy
 SIZE?=		size
 
-.if ${CC:T:Micc} == "icc"
-COPTFLAGS?=	-O
-.else
-. if defined(DEBUG)
+.if defined(DEBUG)
 _MINUS_O=	-O
 CTFFLAGS+=	-g
-. else
+.else
 _MINUS_O=	-O2
-. endif
-. if ${MACHINE_CPUARCH} == "amd64"
+.endif
+.if ${MACHINE_CPUARCH} == "amd64"
 COPTFLAGS?=-O2 -frename-registers -pipe
-. else
+.else
 COPTFLAGS?=${_MINUS_O} -pipe
-. endif
-. if !empty(COPTFLAGS:M-O[23s]) && empty(COPTFLAGS:M-fno-strict-aliasing)
+.endif
+.if !empty(COPTFLAGS:M-O[23s]) && empty(COPTFLAGS:M-fno-strict-aliasing)
 COPTFLAGS+= -fno-strict-aliasing
-. endif
 .endif
 .if !defined(NO_CPU_COPTFLAGS)
-. if ${CC:T:Micc} == "icc"
-COPTFLAGS+= ${_ICC_CPUCFLAGS:C/(-x[^M^K^W]+)[MKW]+|-x[MKW]+/\1/}
-. else
 COPTFLAGS+= ${_CPUCFLAGS}
-. endif
 .endif
-.if ${CC:T:Micc} == "icc"
-C_DIALECT=
-NOSTDINC= -X
-.else
 C_DIALECT= -std=c99
 NOSTDINC= -nostdinc
-.endif
 
 INCLUDES= ${NOSTDINC} ${INCLMAGIC} -I. -I$S
 
@@ -89,36 +76,31 @@ INCLUDES+= -I$S/dev/cxgb -I$S/dev/cxgbe
 
 CFLAGS=	${COPTFLAGS} ${C_DIALECT} ${DEBUG} ${CWARNFLAGS}
 CFLAGS+= ${INCLUDES} -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h
-.if ${CC:T:Micc} != "icc"
 .if ${CC:T:Mclang} != "clang"
 CFLAGS+= -fno-common -finline-limit=${INLINE_LIMIT}
-.if ${MACHINE_CPUARCH} != "mips"
+. if ${MACHINE_CPUARCH} != "mips"
 CFLAGS+= --param inline-unit-growth=100
 CFLAGS+= --param large-function-growth=1000
-.else
+. else
 # XXX Actually a gross hack just for Octeon because of the Simple Executive.
 CFLAGS+= --param inline-unit-growth=10000
 CFLAGS+= --param large-function-growth=100000
 CFLAGS+= --param max-inline-insns-single=10000
-.endif
+. endif
 .endif
 WERROR?= -Werror
-.endif
 
 # XXX LOCORE means "don't declare C stuff" not "for locore.s".
 ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${CFLAGS}
 
 .if defined(PROFLEVEL) && ${PROFLEVEL} >= 1
-.if ${CC:T:Micc} == "icc"
-.error "Profiling doesn't work with icc"
-.endif
 CFLAGS+=	-DGPROF -falign-functions=16
-.if ${PROFLEVEL} >= 2
+. if ${PROFLEVEL} >= 2
 CFLAGS+=	-DGPROF4 -DGUPROF
 PROF=	-pg -mprofiler-epilogue
-.else
+. else
 PROF=	-pg
-.endif
+. endif
 .endif
 DEFINED_PROF=	${PROF}
 
diff --git a/sys/conf/kmod.mk b/sys/conf/kmod.mk
index 2239d66..6d22e41 100644
--- a/sys/conf/kmod.mk
+++ b/sys/conf/kmod.mk
@@ -88,25 +88,17 @@ __KLD_SHARED=yes
 __KLD_SHARED=no
 .endif
 
-.if ${CC:T:Micc} == "icc"
-CFLAGS:=	${CFLAGS:C/(-x[^M^K^W]+)[MKW]+|-x[MKW]+/\1/}
-.else
-. if !empty(CFLAGS:M-O[23s]) && empty(CFLAGS:M-fno-strict-aliasing)
+.if !empty(CFLAGS:M-O[23s]) && empty(CFLAGS:M-fno-strict-aliasing)
 CFLAGS+=	-fno-strict-aliasing
-. endif
+.endif
 WERROR?=	-Werror
-.endif
 CFLAGS+=	${WERROR}
 CFLAGS+=	-D_KERNEL
 CFLAGS+=	-DKLD_MODULE
 
 # Don't use any standard or source-relative include directories.
-.if ${CC:T:Micc} == "icc"
-NOSTDINC=	-X
-.else
 CSTD=		c99
 NOSTDINC=	-nostdinc
-.endif
 CFLAGS:=	${CFLAGS:N-I*} ${NOSTDINC} ${INCLMAGIC} ${CFLAGS:M-I*}
 .if defined(KERNBUILDDIR)
 CFLAGS+=	-DHAVE_KERNEL_OPTION_HEADERS -include ${KERNBUILDDIR}/opt_global.h
@@ -121,7 +113,7 @@ CFLAGS+=	-I. -I@
 # for example.
 CFLAGS+=	-I@/contrib/altq
 
-.if ${CC:T:Micc} != "icc" && ${CC:T:Mclang} != "clang"
+.if ${CC:T:Mclang} != "clang"
 CFLAGS+=	-finline-limit=${INLINE_LIMIT}
 CFLAGS+= --param inline-unit-growth=100
 CFLAGS+= --param large-function-growth=1000
@@ -129,9 +121,7 @@ CFLAGS+= --param large-function-growth=1000
 
 # Disallow common variables, and if we end up with commons from
 # somewhere unexpected, allocate storage for them in the module itself.
-.if ${CC:T:Micc} != "icc"
 CFLAGS+=	-fno-common
-.endif
 LDFLAGS+=	-d -warn-common
 
 CFLAGS+=	${DEBUG_FLAGS}
diff --git a/sys/dev/aic7xxx/aicasm/Makefile b/sys/dev/aic7xxx/aicasm/Makefile
index c077285..b8352d6 100644
--- a/sys/dev/aic7xxx/aicasm/Makefile
+++ b/sys/dev/aic7xxx/aicasm/Makefile
@@ -24,12 +24,7 @@ WARNS?=	5
 DEPENDFILE=	.depend_aicasm
 .endif
 
-.if ${CC:T:Micc} == "icc"
-CFLAGS+=	-restrict
-NOSTDINC=	-X
-.else
 NOSTDINC=	-nostdinc
-.endif
 CFLAGS+= ${NOSTDINC} -I/usr/include -I.
 .ifdef MAKESRCPATH
 CFLAGS+= -I${MAKESRCPATH}